Hitachi RPI-0.8FSG1 Service Manual page 67

Alarm
Code
G "RUN" light flickers and "ALARM" is indicated on the remote control switch.
G The unit No., alarm code and the unit code is alternately indicated on the set temperature section,
and the unit No. and alarm code are indicated on the display of the outdoor unit PCB.
# This alarm code is indicated when the capacity setting dip switch, DSW2 on the outdoor unit PCB1,
is not set (all the settings from #1 to #3 are OFF) or mis setting.
# This alarm code is indicated when the total indoor unit capacity is smaller than 50% or greater than
150% of the combined outdoor unit capacity.
Are #1-#3 of DSW2 on
the outdoor unit PCB1
set correctly?
Yes
Are #1-#4 of DSW3 on
the indoor unit PCB set
correctly?
Yes
Are the setting of
DSW1 on the outdoor
unit PCB1 and the setting
of DSW5 on the indoor
unit PCB totally same in
a refrigerant cycle?
Yes
Total capacity of the
indoor units is wrong.
Phenomenon
Incorrect Capacity Setting of Indoor Unit
Incorrect Capacity Setting of Outdoor Unit
Total Indoor Unit Capacity Connected to the
Outdoor Unit is Beyond Permissible Range
Refrigeration Cycle Setting of Outdoor Unit
and Indoor Unit is Different
Combination
Outdoor Unit Model
RAS-5FSG(3)
RAS-8FSG(3), RAS-8FXG(3)
RAS-10FSG(3), RAS-10FXG(3)
RAS-16FSG, RAS-16FS3
RAS-20FSG, RAS-20FS3
RAS-24FSG1, RAS-24FS5
RAS-30FSG1, RAS-30FS5
Incorrect Capacity Setting or Combined Capacity
between Indoor Units and Outdoor Unit
No
No
No
G In case of 16 or less of total indoor unit, set the dip switch DSW1
of outdoor unit PCB1 and DSW5 of indoor unit PCB correctly.
G In case of 17 or more of total indoor unit, set DSW5 of indoor unit
PCB at {(DSW1 of outdoor unit PCB1)+1}.
Cause
Combined Indoor Unit
Total Capacity
Total Q'ty
2-8 sets *1)
4.0-10.4
2-12 sets
5.0-13.0
2-13 (16) sets *2) 8.0-20.8
2-16 sets 10.0-26.0
2-27 sets 12.0-31.2
2-30 sets 15.0-39.0
Check Item
Check combination
of indoor units and
capacity setting on PCB.
Check capacity setting
on outdoor unit PCB.
Check outdoor unit
model by calculating
total indoor units
capacity.
Check refrigeration
cycle setting on
outdoor unit PCB and
indoor unit PCB.
(HP)
*1): If the capacity of one indoor unit
2.5-6.5
is the same as of the outdoor
unit, the system can be operated.
*2): In case of changing the indoor
unit capacity from 1.0HP or 1.5HP
to 1.3HP by dip switch setting.
TROUBLESHOOTING
Set the capacity for PCB1.
Set the capacity for PCB.
Set them correctly.
Action
(Turn OFF Main Switch)
Correctly set dip switch,
DSW3.
Correctly set dip switch,
DSW2.
Ensure that total
indoor unit capacity is
from50% to 130%.
Set them correctly.
Notes
1-57